They are different models of the same console.
The regular GBA had its buttons either side of the screen. The GBA SP was square in shape, in a clamshell design, the screen section folding down over the buttons, like a Nintendo DS. Then there was a GBA SP+ which was the same thing but with a backlight - many people had complained the screen was too dark.
One important difference was that the regular GBA was disposable battery powered, while the SP had a rechargable internal battery.
yes you can
No. VisualBoy Advance only supports Game Boy, Game Boy Color, and Game Boy Advance games.
You must have the Game Boy Advance Connecter Cable.
The second hand Game Boy Advance is the Game Boy Advance SP. = =
U can , only if u have a gbc not gba
Sp has lighter screens. ( because sp means special screen in my opinion)
no
No, since Pokémon Yellow is on the Game Boy Color, and Pokémon Fire Red is on the Game Boy Advance, it is not possible to trade between these games. The Game Boy Color is not compatible with the Game Boy Advance.
you can't
You can't trade Pokemon between GameBoy Color and GameBoy Advance. Sorry.
Yes, you can play the game on a Game Boy Advance SP. The Game Boy Advance SP can play both Game Boy and Game Boy Color games, in addition to Game Boy Advance games.
yes you can