Mine was an R4, but I’ve heard of the Supercard. I don’t remember the ARM7 patch but I’ve heard of it.

I do remember trimming games. The DS “Nitro” card held 32MB of storage, and every ROM was 32MB, even if the game didn’t take up that much space. A trimmer would remove the junk data. Some games, for anti-piracy purposes, would detect the junk data, so you couldn’t trim them. (If a game was less than 16MB, or 8MB, it would go on a 16MB or 8MB card, respectively; I don’t think there were 64MB cards, but there might have been.)

StreetPass, and I think all DSes could do it. Yes, it tracked steps, and it detected other DSes. If you both had the same game (or related games, such as Pokémon Diamond and Pokémon Pearl, I think was the twin game — I only had Diamond) and you both had your consoles sleeping (i.e. in low power mode), certain things could happen. If you didn’t have the same game, it still registered the connection.

DS users could also anonymously chat with one another. Having a DS at an airport, hotel, or convention was a lot of fun because you’d have tons of people in the area, and if you were playing something popular like Pokémon or Animal Crossing, you were also getting a lot of contacts.

The DS Lite was such a good little handheld. Especially with a flashcart in both ports. The GBA one I had couldn’t hold a ROM, you had to flash it from the DS one every time, but GBA games weren’t big, I didn’t have many, and I had a huge SD card in my flashcart.

Even in pink. (I’d just put stickers all over it, then put a clear clamshell case on it because those stickers would get icky.) (Not that I don’t like the pink DSL. It’s a fine look. I just prefer my electronics to be black.)

Mass Effect?

Spoilers for the beginning of Mass Effect 2 (because the trilogy is meant to be played back-to-back-to-back, and that’s how it’s sold now, as a Legendary Edition that bundles them up as one product).