Why did Lucas have a female Chimchar? And then a male?

Question

So a long time ago I was playing Pokemon diamond. When Lucas was demonstrating how to catch a Pokemon, his chimchar was female. ( I still play diamond though I'm past the champion) and today when I started pearl, his chimchar was male. I'm deseprate to know.

Comments

there is no way Lucas had a female Chimchar. He can't.
http://pokemondb.net/pokebase/203703/is-it-possible-for-a-rivals-starter-pokemon-to-be-female

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According to Bulbapedia, at least, Lucas's Pokemon's genders get re-randomized every battle.

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So is anyone going to Answer the question with those sources?

I mean I would've but that'd have been answer stealing.

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I think we've been interpreting this question incorrectly, she's talking about two separate save files, not the same save file.

Answer 1

When Lucas picks his starter Pokemon, it selects male or female. Because you were using two separate games (They don't have to be separate cartridges, just different save files.) it is possible for Lucas's starter Pokemon to be a different gender. However, all of Lucas's other Pokemon have set genders, so his starter Pokemon is the only Pokemon that he has whose gender can be different between different save files.

Hope this helps!
Source