boner
I think it's a not-licensed-by-Nintendo cartridge & it would not surprise me if Nintendo didn't allow other retailers to sell them.

StanleyPain
It wasn't. For some reason, Micro Machines (despite being a surprisingly good racing game) never got approved or went through Nintendo approval. I can't remember the name of the company off-hand, but they put out these carts that were not the standard size of official NES games, and they were this ugly color. They never quite fit in my machine right and I always had to sort of jam them in to get them to work.

fluffy
Aladdin. Their entire business model was based on circumventing Nintendo's licensee lockout in as cost-effective a way as possible.

I have two of their "deck enhancers."

Spit Spingola
I think they were affiliated with Galoob in some way. Galoob made Micro Machines and the Game Genie.

Hooker
Bulb.

pastorofmuppets
Even if he'd never touched one, his name is still freakin' Thor, so I think we can trust him.