A couple of useful RAM addresses.
SystemID SNES
000E8D w s 0 WRAM X-speed Diddy
000B1D w u 0 WRAM X-pos Diddy
000DBE b u 0 WRAM X-sub Diddy
000EF5 w s 0 WRAM Y-speed Diddy
000FF9 w s 0 WRAM Y-pos Diddy
000BC5 w u 0 WRAM Diddy Y Pos
000E26 b u 0 WRAM Y-sub Diddy
000E8B w s 0 WRAM X-speed Donkey
000FC3 w u 0 WRAM X-pos Donkey
000DBC w s 0 WRAM X-sub Donkey
000EF3 w s 0 WRAM Y-speed Donkey
000FF7 w s 0 WRAM Y-pos Donkey
000E24 b u 0 WRAM Y-sub Donkey
000D4B b u 0 WRAM Sprite 1
000D4D b u 0 WRAM Sprite 2
000D51 w u 0 WRAM Sprite 6
0000BE w s 0 WRAM X-camera
000E8F w s 0 WRAM MineCart Speed
000E91 w u 0 WRAM MineCart Speed 1
000E93 w u 0 WRAM MineCart Speed 2
000E95 w u 0 WRAM MineCart Speed 3
000DC6 w u 0 WRAM Mine Cart Sub
000B1F w u 0 WRAM Enemy3 X
000B21 w u 0 WRAM Enemy4 X
000B23 w u 0 WRAM Enemy5 X
000B25 w u 0 WRAM Enemy6 X
000B27 w u 0 WRAM Enemy7 X
000B29 w u 0 WRAM Enemy8 X
000BC3 w u 0 WRAM Enemy Y
000BC7 w u 0 WRAM Enemy3 Y
000BC9 w u 0 WRAM Enemy4 Y
000BCB w u 0 WRAM Enemy5 Y
000BCD w u 0 WRAM Enemy6 Y
000BD1 w u 0 WRAM Sprite Y
000BDF w u 0 WRAM Sprite Y
000BE3 w u 0 WRAM Sprite Y
000BE7 b u 0 WRAM Sprite Y
000046 w u 0 WRAM Frames
000048 w u 0 WRAM Minutes
0016FC b u 0 WRAM Superjump Diddy
0016FA b u 0 WRAM Superjump Donkey
000565 w u 0 WRAM
000060 w u 0 WRAM
0000C0 w u 0 WRAM
00149C b u 0 WRAM Counter