Insert the game cartridge into the back if that's what you're asking.
yes u can play any DS game on the DSI.
Yes. Since Yoshi Island DS is a NDS game, the DSi can play it.
You could play it on both. Any DS game can play on your DSi
Yes, the Nintendo DS lite can play DSi games
Yes. It is a DS game, with DSi-enhancements. Because of this, the game is region-locked when played on a DSi, DSi XL or 3DS. This does not apply when playing on a DS or DS Lite.
no you can't play dsi games in ds but you can play ds games in dsi.
Yes, the NDSi and NDS can connect to play DS games
It looks the same as a DS game card, and you can also play your normal DS games in the DSi.
Yes, it's a regular DS game, any DS and DSi can play it.
Of couse, the game is not on the ds or dsi. It's a game card
Well, any game that you can buy on the DSi store is not a DS game, such as "The Minis March Again." There is a DSi-only game which requires the camera to play, it is called Monster Finder and cannot be played on a regular DS (though it should work fine on a DSi).
On the Original Nintendo DS, and Nintendo DS lite, you can play Game Boy and Game Boy Advance games. But on the Nintendo DSi and Nintendo DSi XL, there is no Game Boy or Game Boy Advance slot.