What is a Pokémon no one mentions but has been really helpful for you?

See title. Also, what is a Pokémon everyone says you should use but does nothing?

For me, cobalion is really good. Unlocked him very early one (one of my first epic eggs) and nothing has come close to the damage it does with iron head and body slam. Cleared classic twice with him, then started endless. Didn’t use it in endless the first 7 runs, got to round 50 twice and that’s where it ended. 8th run I used cobalion again, currently in round 736.