Trading (In-Game)

In-Game Trading takes place in certain levels of PokémonTower Defense. It is based on trades available in the original games.

Method
Trades are offered upon successful completion of the relevant level. The player must not skip the end cutscene, but instead simply click "Next." A character known only as Old Man will enter and offer a Pokémon for a certain one the player used in the level (i.e. the Pokémon used an Attack move at least once during the level; it does not need to stay on the ground for the duration of the level).

The Pokémon received will always be level 1.

If the player trades a Shiny Pokémon, the received Pokémon will be guaranteed to be shiny.

In all the cases, trading is the only in-game way to obtain the relevant Pokémon.