The first two challenges - Incense and Trade - are dependent on which version of Pokémon Go Tour: Kanto you re playing.
For the Incense Collection Challenge, you ll need to catch the Pokémon which are exclusively attracted to Incense in your version of the event. Red version players, for example, will have to catch Growlithe, Oddish and Mankey, among others.
The Trade Collection Challenge, however, will involve trading Pokémon with a player using the opposite version to yours - Red to Green and vice versa - to collect the Pokémon which are not available in your version of Pokémon Go Tour: Kanto.