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.

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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.