Turns out I was kinda right about Street Racing Syndicate. I was able to get ingame by disabling wram i-cache, and therefore further than before. The game is pretty glitchy and only rarely will you get past the main menu and be able to get into the game- I found the best strategy to be button mashing A and trying to get as quickly past the menu's as possible. Then in the race you'll be presented with a glitchy mess of textures surrounding a floating car model. It's hard to explain and an interesting experience.
Tried out Doom too.The video is glitching from the beginning with what can be described as a flashing screen or interrupting picture. The game crashes at random points ingame. Any cache settings don't change the game, neither do the clock speeds. Sound is very good though and when it crashes it plays through the games sound effects. This seems to be a regression since on the wiki it states that the game played well with that build from 24.12.19.
Anyways,
@Dodain47 I was wondering if you could test this Minish Cap save with specifically a DSi if you own one. I'm getting weird shimmering graphics in the bridge near the stairs on the bottom of the fair area you start in. This issue did not exist in the previous build and does not happen in latest the 3DS build. Also I just noticed that sound is crackling on the DSi but not on 3DS.