DraStic

Turn on the "Disable Edge-Marking" option and change the Video filter from Linear to Quilez the Video settings.

If you didn't make an in-game save and only used savestates then there isn't much you can do about it. Its why we stress the point that it's important to make in-game saves.

Have you tried mapping your keyboard keys in the external controller settings in the drastic settings?

I find the recording thing to be a bit out of the question. It's a pretty resource-intensive feature for a phone, especially mid-end models. Screen recorders have very little performance impact even on low end budget phones such as ones using the very common Snapdragon 625 chipset. Most apps use An...

Did you double check to see if the walk through walls cheat works on the USA version (from a custom cheat code)? If it does, its mostly likely the cheat or perhaps the button combination is wrong. Sometimes in those games you need to go into a building and back out for the cheat to work after activa...

What file format does your R4 use for saving? AFAIK there are two types of clones, direct R4 clones that run Wood R4 and the other type is a DSTT clone (often branded as R4 Upgrade) that runs some custom firmware. Both firmwares use the raw .sav format, but you have to rename it to .nds.sav for Woo...

did you rename the .dsv file to .sav or .nds.sav?

Have you doubled checked you included the .sav file that VBA generated?

I'm not entirely sure it matters but is the GBA game the same region (USA & European versions are considered seperate) and language as the Pokemon Heartgold you are using?

Did you recently change phones or change any files in the Drastic folder? Its telling that you were either using BIOS files when you made the save state (early versions of Drastic required a BIOS) and that you are loading it without the BIOS files existing anymore, or you make the save states before...

The BIOS issue is only for savestates because Drastic uses an entirely different format. However the in-game DSV saves from SuperNDS are Desmume format (Because SuperNDS is just a copy of nds4droid with advertisements added) and Drastic is compatible with Desmume saves. Have you tried to import the...