How to get Deerling winter form in any non Gen 5 game?

Question

Is there any other way? I lost my black and white cartridges and black 2 is really annoying.

Answer 1

Because seasons have been abandoned as a mechanic, Deerling and Sawsbuck do not change appearance, and their Summer, Autumn, and Winter forms must be transferred from a Generation V game.

source

Comments

but if you caught spring, summer, autumn or winter deerling from BW and transferring to newer games the deerling will stay on its season form?

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yes (6 characters)