Drifblim @ Psychic Seed / Electric Seed
EVs: 252 SpA / 4 Def / 252 Spe
Modest / Bold Nature
- Strength Sap / Calm Mind
- Shadow Ball
It's a discount Hawlucha, but special-oriented and no Hawlucha to compete within this tier, however it still has the others to compete as an Unburden user, mainly Thievul (a shoutout for MrCookiepants) and Hitmonlee. Recently got Strength Sap, which not only prolongs its longevity but also mitigates Quagsire's main offensive stat (as it ignores yours) as well as other physical powerhouses on the tier. When Dynamaxed, Drifblim can either use Psychic and use its Psychic Seed to provide a +1 SpD and a +2 Spe thanks to Unburden or can pull a Thunderbolt to provide +1 Def and +2 Spe with Electric Seed. If those boosts aren't enough for you, you can set up Calm Mind and then Dynamax to sweep. Shadow Ball provides coverage against Psychic-types who try to make use of the Psychic Terrain plus it gets STAB. Modest nature is key for your offense but if you feel unsure when setting up Calm Mind then pick Bold nature and move 100 EVs from SpA to Def.
Drifblim has a good opportunity thanks to Unburden coupled with Dynamax, but has issues in the form of awful Defense and Special Defense stats and vulnerability to most priority moves that hit super-effectively, which means that it will have a hard time against physical powerhouses and priority users. Not to mention that the poor ballon doesn't get benefits from both terrains (as mentioned by viol and bass), meaning that it is still vulnerable to Sucker Punch, Shadow Sneak and Ice Shard. Unaware Quagsire can ignore the boosts, it is immune to Thunderbolt and proceeds to smite Drifblim with Stone Edge or Max-Rockfall. Drifblim is outclassed by Thievul and directly competes with Hitmonlee as an Unburden sweeper, speaking of which, Thievul can also counter Drifblim aswell as it is immune to Psychic while getting benefits from the terrain. Stealth Rock is also a bane to Drifblim's longevity.