How long for Delta Pokemon to respawn?

General Discussion Questions
1

I knocked out the Ralts on Route 4 on accident. Can it respawn or come back, and how long does it take or what causes it?

2

they don’t. Get me a shiny Axew and I’ll trade you my Delta Gardevoir though!

3

I can do a shiny axew and delta gardevoir if anyone wants

4

kinda off topic but by any chance do you have a delta charmander (non shiny)? I can even trade it back if u want

5

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I just hatched her since I have a delta Gallade, if you want to try trading we can try it just tell me how since I haven’t trade before xD