Since He lacks a Delta Brain Wave due to being a Living Grandfather Paradox; He is the only person immune to the effects of The Brain Spawn; and The only one immune to the Dark One;

So If He cannot be Mind Controlled, or have his mind be read; and couldn't be Made any dumber than he already was by the Brains' stupidification powers;

Does that mean Hypnotoad cannot affect Fry's Mind; like how it affects everyone else's mind?