I'm working on making character stats for G1 Transformers based on Star Wars Miniatures, which is compatible with Dungeons & Dragons Miniatures and also adaptable to the Star Wars Role Playing Game and possible D&D RPG (not sure about AD&D) - anyway, you should be able to adapt the D&D and Star Wars miniatures and RPG systems to make a G1 Transformers miniatures or role playing game based on these stats.

Now to establish a "standard" I have so far created stats for very weak and one very powerful Transformer. From this I should have an idea for establishing the power levels of more "average" characters. So far I'm only focusing on the 1984 series of toys/characters.

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Rumble
Faction: Decepticon
Character Points: 26
Hit Points: 50
Defence: 15
Attack: +6
Damage: 20

Special Abilities
Flight (Ignores difficult terrain, enemy characters, low objects and pits when moving. Only applicable in robot mode.)
Mass Shift (This character cannot be targeted by nonadjacent enemies in alternate mode. Enemies within 10 squares with Accurate Shot ignore this special ability.)
Transformation (Replaces attacks; Able to change between robot mode and alternate mode).

Energon Powers
Energon 3
Cassette Spy (Energon 1, gains Anticipation*. Only applicable in alternate mode when this character is within 6 squares of an ally with Communications***)
Quake Generation (Energon 1, replaces turn; 20 damage to every legal target and to each character adjacent to that target; Save 11. Only applicable in robot mode)

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Frenzy
Faction: Decepticon
Character Points: 26
Hit Points: 60
Defence: 14
Attack: +7
Damage: 20

Special Abilities
Flight (Ignores difficult terrain, enemy characters, low objects and pits when moving. Only applicable in robot mode.)
Mass Shift (This character cannot be targeted by nonadjacent enemies in alternate mode. Enemies within 10 squares with Accurate Shot ignore this special ability.)
Transformation (Replaces attacks; Able to change between robot mode and alternate mode).

Energon Powers
Energon 3
Audio Disruptor (Energon 1, replaces attacks; 10 damage and Paralysis** to all enemies within 12 squares; Save 11)
Cassette Spy (Energon 1, gains Anticipation*. Only applicable in alternate mode when this character is within 6 squares of an ally with Communications***)

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Optimus Prime
Faction: Autobot
Character Points: 68
Hit Points: 120
Defence: 19
Attack: +12
Damage: 20

Special Abilities
Accurate Shot (Can attack an enemy with cover even if it's not the nearest enemy)
Charging Automotive Assault +30 (Replaces turn; Can move up to 12 squares, then make an attack at 30 damage against an adjacent enemy. Only applicable in alternate mode. Enemies with Flight ignore this special ability; Save 11)
Damage Reduction 10 (Whenever this character takes damage, reduce the damage dealt by 10. Adjacent enemies with energy melee weapons ignore this special ability)
Double Attack (On his turn, this character can make 1 extra attack instead of moving)
Penetration 10 (Enemies' Damage Reduction is reduced by 10 against this character's attacks)
Remote Component (Whenever this character takes damage, all allied characters who share Rapport with this character also takes the same amount of damage -10)
Rigid (Can't squeeze. Only applicable in alternate mode)
Roll Out (Can move up to 18 squares without attacking)
Tow Trailer (This character and an adjacent ally with Trailer can move up to 18 squares simultaneously)
Transformation (Replaces attacks; Able to change between robot mode and alternate mode).

Energon Powers
Energon 2 ; Energon Renewal 1
Energon Leap (Energon 1: This turn, this character can move through enemy characters without provoking attacks of opportunity)
Energon Spark 8 (If this character is defeated, immediately add 8 Energon points to an allied character with an Energon rating; that allied character can spend Energon points one extra time per turn for the rest of the skirmish)

Commander Effect
Whenever an ally would be defeated, with a save of 16, it instead immediately returns to play with full Hit Points.

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Optimus Prime's Trailer
Faction: Autobot
Character Points: 25
Hit Points: 80
Defence: 12
Attack: +9
Damage: 30

Special Abilities
Damage Reduction 10 (Whenever this character takes damage, reduce the damage dealt by 10. Adjacent enemies with energy melee weapons ignore this special ability)
Droid (Immune to critical hits)
Emplacement (Cannot move or be moved. Set up anywhere on your half of the battle map. Only applicable in robot mode)
Mounted Weapon (Only allies with Mounted Weapon or Gunner**** can combine fire with this character)
Rapport (Costs 1 less when in the same squad as a character named Optimus Prime or Roller)
Remote Component (Whenever this character takes damage, all allied characters who share Rapport with this character also takes the same amount of damage -10)
Splash 20 (If this character's attack hits, all characters adjacent to the target take 20 damage, Save 11. If the attack misses, the target and all adjacent characters take 20 damage, Save 11)
Trailer (Cannot move. Can be moved by an adjacent ally with Tow Trailer. Only applicable in alternate mode)
Transformation (Replaces attacks; Able to change between robot mode and alternate mode).
Transport 10 (This character can transport up to 10 human-sized allies or 6 allies with Mass Shift in alternate mode. Remove these allies from the battle grid; they move simultaneously with this character as though they had Flight. They cannot make attacks and do not count as legal targets for enemies. A transported ally can return to the battle grid immediately before your first activation of the round. If this character is defeated, all transported allies are also defeated, Save 11. Only applicable in alternate mode)
Transportation (This character can transport up to 1 Large ally or 2 Small or Medium allies that end their move adjacent to it. Remove these allies from the battle grid; they move simultaneously with this character as though they had Flight. They cannot make attacks and do not count as legal targets for enemies. A transported ally can return to the battle grid immediately before your first activation of the round. If this character is defeated, all transported allies are also defeated, Save 11. Only applicable in alternate mode)

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Roller
Faction: Autobot
Character Points: 9
Hit Points: 30
Defence: 18
Attack: +0
Damage: 0

Special Abilities
Droid (Immune to critical hits)
Override (At the end of his turn, this character can designate 1 door that he can see has open or closed; it remains open or closed until the end of this character's next turn, or until he is defeated)
Rapport (Costs 1 less when in the same squad as a character named Optimus Prime or Optimus Prime's Trailer)
Remote Component (Whenever this character takes damage, all allied characters who share Rapport with this character also takes the same amount of damage -10)
Stealth (If this character has cover, he does not count as the nearest enemy for an attacker farther than 6 squares when choosing targets)
Transport 6 (This character can transport up to 6 human-sized allies or 6 allies with Mass Shift in alternate mode. Remove these allies from the battle grid; they move simultaneously with this character as though they had Flight. They cannot make attacks and do not count as legal targets for enemies. A transported ally can return to the battle grid immediately before your first activation of the round. If this character is defeated, all transported allies are also defeated, Save 11.)

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*Anticipation (Re-roll initiative once per round)
**Paralysis (enemy characters are considered activated)
***Communications - this is a new ability that I've yet to define. Characters such as Soundwave and Blaster will feature this ability to make them compatible with the Autobot and Decepticon Cassettes.
****Gunner +X (Can combine fire with adjacent allies who have Mounted Weapon, granting +X Damage)