GBA Flashcart Help

Hi i have a gameboy sp and i was wondering if their is a flashcart that i can buy. I know their is some but i cant find a website that still sells them. Thank-you in advance :)

can it play games (mario, pokemon etc?) its dosent say if it can or not (nor if it has glitches, A.P fixes etc)

I dont know if GBA flashcard are still selling, because it is too old, but you can check it from http://www.martgame.com/nds-accessories/r4-card.html
I just known some GBA flashcart about NDS.
Slot-1 Flashcarts
There are four flashcarts that can emulate GBA games without the need for a slot-2 cart. Supercard DSTWO
EX4i
iPlayer
iSmart MM
CycloDSi Evolution (only works on a DSi and is extremely limited)Slot-2 Flashcarts
You can also run GBA games using the below slot-2 flashcart. Do note that flashcarts of this type will only work in a DS Phat or DS Lite system. Flashcarts of this type will provide you with perfect GBA game compatibility. EZ Flash 3-in-1
EZ-Flash IVAlternative Method for all flashcarts
This method requires the use of a GBA emulator created by ichichfly. In DSi Mode (using CycloDSi Evolution or SudokuHax), you can run games/homebrew up to 14MB. Otherwise you will have to obtain a GBA game/homebrew that is 2MB or below. Do note that this method does not work with many GBA games.