At least this increases your chance of catching Koffing in its Shiny form. This is also a very good opportunity to make up ground in the monthly Catch Challenge – the round monster is very easy ...

Mythical Island's Koffing lets you summon another Koffing to the field, while Genetic Apex's Weezing has an ability that lets you Poison the opposing Pokémon for no energy if it's in the active ...