0426 Drifblim

Hex is recommended for its fast energy generation, while Astonish is just a terrible move overall. 

Icy Wind has a decent damage profile and, more importantly, a 100% chance to drop the target's attack stat by 1 stage. This artificially boosts Drifblim's bulk and frequently forces switches or gives the next Pokemon on your team a great chance to come in with an advantage. Mystical Fire does the same thing but offers different coverage - it trades Flying coverage for superior Steel coverage. Shadow Ball is noted for being one of the better attacks in the game due to its great neutral coverage and solid damage per energy rating, and works great in conjunction with Icy Wind or Mystical Fire, as they can be used to bait shields easily. This is made especially effective when you consider the fact that Icy Wind's / Mystical Fire's Attack debuff bypasses shields.

Drifblim is an interesting Pokemon due to its unique typing and moveset. While it is not the most meta Pokemon out there (mainly due to competition from other Ghosts), it can pull its weight thanks to its wide coverage and annoying debuffs. It shines best in limited cups when its fellow Ghost competitors are banned.

The level 50 update significantly improves Drifblim's performance in Ultra League, as its favorable typing and movesets allow it to perform well consistently. Access to both Shadow Ball and Icy Wind or Mystical Fire allows Drifblim to hit pretty much everything in the meta for at least neutral damage, which means Drifblim will always have some play. Drifblim also notably has solid performances in both open Ultra League and Premier Cup, though Giratina is still more dominant with greater bulk and access to stronger Shadow Claw or Dragon Breath, while Jellicent's superior bulk and access to Surf makes it a stiff competitor.

Drifblim's restricted CP and high competition for its niche leaves it high and dry in the Master League.