Pikachu -> Ash-Pikachu

Charmander -> Charmeleon -> Charizard -> Ash-Charizard

Snorlax -> Ash-Snorlax

Bulbasaur -> Ivysaur -> Venusaur -> Ash-Venusaur

Squirtle -> Wartortle -> Blastoise -> Ash-Blastoise

Taurus

Krabby -> Kingler

Primeape -> Annihilape

Muk

Heracross -> Ash-Heracross

Chikorita -> Bayleef -> Meganium -> Ash-Meganium

Quilava -> Typhlosion -> Ash-Typhlosion

Slowpoke -> Slowking -> Ash-Slowking

Wobbufett

Houndour -> Houndoom -> Ash-Houndoom

Totodile -> Croconaw -> Feraligatr -> Ash-Feraligatr

Shiny Noctowl

28 Unowns, Lil G

Scyther -> Scizor-> Ash-Scizor

Raikou

Lapras

Rhydon -> Rhyperior

Suicune

Tyranitar -> Ash-Tyranitar

Phanpy

Tyrouge -> Hitmonlee

Shiny Gyarados -> Shiny Ash-Gyarados

Zapdos

Celebi

Dratini

Latias

Entei

Latios

Pidgeotto -> Pidgeot

Taillow

Treecko -> Grovyle

Ralts

Sharpedo

Aron

Corphish

Mudkip

Growlithe

Torchic