There's a port of melonDS to Android at https://github.com/rafaelvcaetano/melonDS-android. Keep in mind you'll need a CPU capable of running AArch64 instructions and a 64-bit OS if you want dynarec support.
Just make sure to Pirate it, Paid emulator Devs on Android are greedy pieces of shit, many violate GPL Licenses just to make a quick buck, don't give in, don't give them money.
In general emulators that aren't open source are also shady and should be avoided wherever possible because they:
Can be Malicous
Might use SDK material (not something we care about but it can be used against them).
May violate GPL or contain stolen code from others' work, which is extremely scummy.
If it helps at all, Drastic DS is developed by Exophase, the developer behind the gpSP emulator, which is open source. Drastic is safe, and has for years been the only decent choice for Android as far as performance goes.
That said, from what I’ve just found, they’ve dropped support for Drastic, so pirating it is a good idea regardless.
First you have to go to the online updater and update all of your configuration files, core files, assets, everything and restart, but then you can simply go to the online updater and download any emulator core for any system.
I am playing on MelonDS which requires one fix to use the touchscreen in-game:
Core options -> screen -> change first option to Touch.
Also for pokemon specifically to have save filed work properly, you have to download a nintendoDS BIOS blob and put it in one of your retroarch folders. There are guides on that.
A little bit of configuration, bit you essentially have every single open source emulator in one app.
DraStic is amazing on midrange devices. Compatibility is excellent in my experience, there's a lot of UI customization available, and there are some nice filter and scaling options built-in. It also has full controller support.
The only DS emulator really worth using in my opinion is Drastic I tried a few other things like lemuroid and MelonDS before finally paying for Drastic.