I'll start
>Decidueye
>Alolan Raichu
>Snorlax
>Buzzwole
>Zoroark
>Hoopa-U
>Starmie
>Tentacruel
>Kingler
>Pachirisu
>Wailord
>Quilfish
>Enrico Pucci
Togekiss
Reuniclus
Porygon-Z
Gardevoir
Bisharp
Arceus
>Caterpie
>Magikarp
He wouldn't be very good at catching or training Pokemon.
>Mewtwo
>Electrode
>Persian
>Gardevoir
>Lopunny
>Smeargle
>Weezing
>Registeel
>Smeargle
>Houndoom
>Rotom-Heat
>Sharpedo
>Hypno
>Probopass
>Meowth
>Golurk
>Krookodile
>Mega Sableye
>Arromatisse
>Musharna
>Slurpuff(?)