Cartoon Network: Double Game - Block Party & Speedway (CIB, Gameboy Advance)

Two games on one cartridge?! What is this, the future?!?!

That's right, it's the future - the year is 2005, and here in the future, we give people lots of value for their money! You get two full games, for the price of one, on one physical cartridge, that you can own forever! 
And even better; once you have purchased this game, you will not be forced to pay a single cent more, for new characters, skins etc.

Everything is unlockable, in the actual game! Isn't the future great?
I truly hope this never changes, and games start becoming like a never ending subscription.
Man, that would suck.... But hopefully future humans, aren't that naive or easily persuaded by gambling tactics - right? 

Condition: Okay/good. The box is somewhat bent, but complete.