Could not erase data

Do you have a memory card. You need one to play.

If you are inserting a DS card, be sure there are no foreign articles inside the slot. Blow into the DS card slot to clear any debris. Also be sure you are inserting the card all the way in until it clicks. I've also found that if you're powering on a game, and you bump, grasp or touch the ds card as the DS is powering on, that can cause it to not read games.

Check the actual DS card itself and carefully look at the exposed contacts on the circuit board. Be sure none of them are scratched, damaged or otherwise. A scratch can damage a contact, thus preventing proper data read.

If anything was spilled onto the DS card, be sure it is thoroughly cleaned with a damp cloth (no cleeaning chemicals!) If you immerse the DS card, or pour liquids on it, that may damage it as well.

Same points hold true for inserting a Gameboy Advance game (if you have a DS or a DS Lite. The DSi and DSiXL do not have Gameboy Advance slots.

If you turn on the DS and nothing happens, try a different DS Card. If it only happens with that one particular game (or games) your DS cards are damaged or need cleaning. If all your games are not playing, there is a problem with your DS. Try your games in a friend's DS just to make sure. You'll probably have to send the unit to Nintendo for repair, or take it to an authorized repair center.

your friend destroyed your game, you need to start a new game, it will only work with an Action replay

WARNING: This will erase all saved game data!

As the game boots up, press "A,B,X,Y,L, and R" all at the same time to erase all saved game data. This resets the game to all defaults and it's like it's a brand new cartridge. Stinks you lose your save data but at least you get to play again.

it is corrupted whish means it wont work any more srry it happene to near enough everyone

you have to download v1.20 and put it on your r4 card then all the games will work try it

Quick, check every menu on the game. This is what happened to a friend who had Mario Kart. "Deleat data" was accadently selected when that person was trying to edit something. The data was lost. Check all menus. The wrong thing could have been selected. If you cannot find a way to deleat data, then make sure you never turned off the DS, DS light, DSi, or whatever when saving. If it was turned off when saving, then the following can happen: Nothing, Data Erase, or data destruction. Data destruction means the cartridge is ruined. That didn't happen to you, though. I am sorry, but you must start over.

Where did you buy this game? Is it from a reliable source? There's been known fake DS games that don't work. And usually the case is the game shows a message "can not access saved data. please turn of power and re-insert game". This is actually my first time with a case where it can't erase the data. Try contacting the previous owner.

try cleanin the game with a wet and dry tissue

Try eject, blow into the port then reinsert. There is a possibility that your ds has blocked the r4 from being used on that ds.