Lemuroid github.com/Swordfish90/Lemuroid is by far my favourite console emulator on android and its free and open source. Its got quick saves and fast forwarding which is great for Pokemon. It also supports zipped ROMs so no need to unzip anything and it has worked with any ROM hack I’ve tried.
I mainly use it for GB, NDS and 3DS since I usually only play on my phone when I have some time to kill when I’m travelling, but it supports so many other consoles too.
<span style="color:#323232;">- Atari 2600 (A26)
</span><span style="color:#323232;">- Atari 7800 (A78)
</span><span style="color:#323232;">- Atari Lynx (Lynx)
</span><span style="color:#323232;">- Nintendo (NES)
</span><span style="color:#323232;">- Super Nintendo (SNES)
</span><span style="color:#323232;">- Game Boy (GB)
</span><span style="color:#323232;">- Game Boy Color (GBC)
</span><span style="color:#323232;">- Game Boy Advance (GBA)
</span><span style="color:#323232;">- Sega Genesis (aka Megadrive)
</span><span style="color:#323232;">- Sega CD (aka Mega CD)
</span><span style="color:#323232;">- Sega Master System (SMS)
</span><span style="color:#323232;">- Sega Game Gear (GG)
</span><span style="color:#323232;">- Nintendo 64 (N64)
</span><span style="color:#323232;">- PlayStation (PSX)
</span><span style="color:#323232;">- PlayStation Portable (PSP)
</span><span style="color:#323232;">- FinalBurn Neo (Arcade)
</span><span style="color:#323232;">- Nintendo DS (NDS)
</span><span style="color:#323232;">- NEC PC Engine (PCE)
</span><span style="color:#323232;">- Neo Geo Pocket (NGP)
</span><span style="color:#323232;">- Neo Geo Pocket Color (NGC)
</span><span style="color:#323232;">- WonderSwan (WS)
</span><span style="color:#323232;">- WonderSwan Color (WSC)
</span><span style="color:#323232;">- Nintendo 3DS (3DS)
</span>