[Custom Feature Question] How do I make a Pokemon that has 2 evolutions only be able to evolve into one.

[PokeDude645]

Ok so basically I want to make a shiny ralts egg mystery gift, but I want it to only be able to evolve into gallade, since I want to give this pokemon a special gift exclusive move, and it wouldn't make since for gardevior. Plus the gift is based on me.

 

[burningplain]

The easiest way to do this is to just make a new ralts form which then evolves into a new kirlia form. Do this in the pokemonforms pbs.
For the ralts you don't have to do anything other then just make a [Ralts,1] as long as you also make a kirlia. For Kirlia, you also need to add the evolution line in the pbs and remove gardevoir from it.

You shouldn't have to make a new gallade, but it may try to evolve you into Mega Gallade. If it does, just change mega gallades pbs from [gallade,1] to [gallade,2].