I just beat Pokemon Shield, doing so with:
James Neal the Inteleon (Lv. 63)
Malkin the Corviknight (Lv. 63)
Makar the Orbeetle (Lv. 63)
Ol King Coal the Coalossal (Lv. 63)
Sergachev the Toxtricity (Lv. 63)
Corey Perry the Grimmsnarl (Lv. 64)
I recently played Pokemon Crystal for the first time ever, beating the E4 with:
Kaleb the Dunsparce (Lv. 51)
Dino the Noctowl (Lv. 51)
Andrew the Lanturn (Lv. 51)
Revan the Xatu (Lv. 50)
HM Slave the Chinchou (Lv. 20)
HM Slave the Raticate (Lv. 16)