>>55274702I get the signifcance of Poliwhril but he never owned one which would just be a weird inclusion. My 6 would be picrel.
Pikachu/Charizard - obvious reasons
Pidgeot - Ties into the end of series with it returning and a pretty memorable Pokemon
Sceptile - Grass type of choice, "cool", strong bond.
Oshawott - Ash would frequently have NFE with him and it finishes the grass/fire/water trio. Lots of personality
Heracross - No type overlap and it really feels like an Ash Pokemon to round things out.
Didn't pick any Kukui Pokemon or any that are "away" like Squirtle, Goodra and Lapras.