#Remade the post with less tags because apparently only the first five tags are searchable.

[maypop-the-dragon]

I'm using the ample time before my DS Day to prepare. I have modded both of the New 3DS systems mentioned in Update #1. It really was easy! Use this guide to try it for yourself.

I made this Deltarune Castle Town theme:

You can download it here.

Add Maypop Castle Town.zip to the /Themes folder on your SD Card. I'm using Anemone to apply themes, since that's what the guide's script installs. I may also make one of UT!Toriel's house.

I reorganized the home screens on both of them to look exactly like in the above video. The organization is necessary because there are so many apps now and probably more to come. I also installed PictoChat because DS Day is not complete without it.

As for the DSi systems, neither of them can turn on as of now. The blue one's charging light comes on when I plug it in, and when I press Power, the power light comes on, as do the screens, but it turns off immediately after the screens fade to white. The black one got to the Health & Safety screen after I plugged it in but turned off shortly after. It does not turn on at all now, and when I plug it in, the charging light flashes.

According to some cursory research (I visited a few Reddit threads), the battery is likely to be the problem. I plan to buy a new battery and try it on both to see if that fixes them. If it fixes both, I will buy a second battery.

Then, I'll move on to the L and R buttons. People on this page suggest blowing on them really hard. Others suggest using compressed air instead to avoid accidentally spitting on the DSi. Still others say that only cleaning them with isopropyl alcohol worked. I will start with whichever of the two solutions I already have the materials for.