Good GBA Games for Road Trip

Family Tennis Advance is a brilliant "cute" tennis game made by Namco. I play it all the time, especially if you have a real person to play against it's a lot of fun. Not sure if it was released outside of Japan, but it's not expensive.

Mario & Luigi: Superstar Saga is very captivating and the funniest RPG I've ever played.

Any Mario/Wario platformer.

Kurukuru Kururin & its successor, Kururin Paradise, are very cool and motivating.

 

Out Run

 

Look at the places you're passing through when you are on a road trip. Very interesting.

 

Any good button smashers like summon night?

 

Button smashers? That always brings Pokemon to mind...

Anyways, I'd suggest a fighting game of some sort.

 

????pokemon???/
i am talking like Action rpg like zelda and stuff.

 

advance wars

 

Guardian Heroes and Guardian Super Heroes. Those are cool.

 

You mean Gunstar Super Heroes? Yeah, it's a sweet game, although not as good as the original IMO. Advance Guardian Heroes, as I think it's called, was always pretty crap in my opinion. Definitely the worst of all Treasure sequels.