OK. Time to take on the Pokémon League!
Won against the first trainer, but got half my team fainted because I'm incompetent :(
Well, I had some Revives, so I can continue...
Second trainer defeated, this one was easy, Magnezone 
quickly finished off all the Flying-type Pokémon
Except that with Toucannon 
, I looked up its type (Normal/Flying), thought I'd let some other Pokémon fight it before Magnezone uses up all its moves, and I chose... Leafeon 
I forgot that Flying is super effective against Grass
Very stupid decision
Poor Leafeon (they fainted again) :(
Third trainer defeated! No-one from my team fainted this time :3
But also, my team is strong against Ghost-types...
Fourth trainer defeated! Catching that Leafeon was definitely a good idea, it made the battle against the Rock-type trainer much easier
Yes, Vaporeon is also super effective against Rock types, but not against a Rock/Electric type...
@vaporeon_ electric doesn’t resist water, actually, so vappy is still supurr effective
@aescling @vaporeon_ it's still high risk though