If you decide just to use the 30 day trial for Pokebank...?

Question

...and don't get all your Pokemon out on time, what will happen to them, if anything happens?

Answer 1

You're feeling questiony today. :3
Thankfully, I feel answery. :D

Nintendo first gives you a week to clear out your Pokemon, however, if you don't get all your Pokemon out on time they will vanish forever. D:

Hope I helped. :)
Source

Comments

how convenient... for Nintendo. No linking to any other accounts (PGL, DW, Etc.) to keep it active then?