Blaziken is Blaziken. Pretty good learnset and u can tutor HJK onto him pretty early
Compound eyes Butterfree. Saved me a lot of times in the early game with sleep powder and tailwind
Eldegoss was a pleasant surprise. Nice bulk, plus leech seed, sing and regenerator
Mr.Mime was actually extremely useful with decent speed and dual screens
Stonjourner was pretty useful with a thicc defense stat, stealth rock and wide guard
Crawdaunt; bred aqua jet onto mine from buizel. Excellent learnset with knock off, sword dance and crabhammer
Mamoswine with thick fat. Rare encounter in Angie's tower, but worth the ice shard and earthquake
Amusing doubles combo with Aevium Ampharos (cotton down) and Aevium Milotic (defiant). Cotton down is still useful outside of doubles
The most difficult part of Rejuv is the early to mid game, where you don't have a lot of options. The best mons in the game, funnily enough, aren't the classically 'good' mons we all know, but the normally unnoticed ones that will carry you through the rough early. Still wish we could get Salamence though, he's my fav dragon