I always thought Mew was a bit mediocre in adv, it looked a lot like Celebi: same stats and largely the same moves. I definitely think it's a pretty bad pokemon for being Uber tier, but it would be insanely strong in OU. Hard to place I guess. EDIT: Taking a closer look at its (adv) movepool, useful ('useful' is subjective) moves that Mew learns that Celebi doesn't: Counter Dynamic Punch (or maybe not) Earthquake Endure Explosion Fire Blast Flamethrower Focus Punch Ice Beam Overheat Roar Rock Slide Seismic Toss Snatch Surf Sludge Bomb Taunt Thunder Wave Thunderbolt Celebi: Baton Pass Heal Bell Leech Seed Perish Song Additionally, Natural Cure is better than Pressure in the majority of situations. Then again, Mew has better typing. I feel like Mew is generally overshadowed by Mewtwo.