Everyone knows Pikachu is made out of cheese.

It is a little-known fact that cheese is actually a very good conductor of electricity. Pikachu is able to regulate his body temperature so he is always at 0 degrees. If this was any higher then the thermal radiation caused by the electrical current would cause Cheese Pikachu to melt.

If you read the lore around Pokemon Generation 4, many wild Pikachu's had contracted a virus rendering them unable to regulate body temperature. Melted Pikachu corpses can be spotted in various location in Pokemon Ruby & Sapphire (but not Emerald). They even made an appearance in certain battle screens where Pokemon were made to fight on the Pikamelts (the Mega Devolved form of Pikachu) - See below screenshot. This is why fire-type moves were super-effective against Pikachu (though only in Gen 4).

Also, Pikacheese was the draft name during Pikachu's design phase.

In summary, it's a hard 'Nay' on Fluffy Pikachu.

Pikacheese.jpeg