Blake nods, and pulls out a Pokeball, flinging it at the center of the smoke cloud. If this doesn't work, hit it again, Celeste. The Umbreon nods, readying itself for another charge at the Koffing if needed.

Blake: Basic Ball v Koffing - Capture Attempt: (1d100+5)[29]

If Uncaptured:
Celeste: Tackle v Koffing - AC: (1d20)[15] 3 + Phys Evasion, (2d8+14)[26] Normal Damage plus (2d8+6)[17] on Crit.