Blue's eaten so much he's become immune

It’s an acquired taste. Kinda like tea.

I think Blue's brain has just been rewired or something.

^^But Blue loved them the very first time he ate them!^

^And having your brain rewired doesn't make you immune to poison. I think Blue has an extra-strong immunity due to drinking so many potions.

So? The other sticks have also drunk a lot of potions.

^^Not in humans. Stick figures might be different. (yeah, this discussion is really speculative)

Why do you think Green was in Hardcore? I don't thought so...

Blue is built different

Technically, all the stick figures are "built different". But then, we're back to where we started... >:(