All of the pokemon Satoshi has used in battle.
For the all-time strongest, I'd say it'd be out of Pikachu, Charizard, Sceptile or Infernape.

AshtonNauran said:
All of the pokemon Satoshi has used in battle.
For the all-time strongest, I'd say it'd be out of Pikachu, Charizard, Sceptile or Infernape.

I think they're also in chronological order of when he obtained them, clockwise, starting with Butterfree.
Whoever drew this must be quite the dedicated fan...!