Bulbasaur of the bed

I mean, technically it is pokemon related

We've known each other, for so long
You're heart's been aching but, you're to shy to say it
Inside we both know what's been going on
We know the game and we're gonna play it

And if you ask me how I'm feeling
don't tell me not to, not to sing

...(continues rickroll)

Ok but where is the funny part?