A couple of memory addresses for Donkey Kong Land.
SystemID GB
062A w s 0 WRAM X-speed
0604 w u 0 WRAM X-pos
0603 b u 0 WRAM X-Sub
0607 w u 0 WRAM y-pos
0606 b u 0 WRAM Y-sub
060A w s 0 WRAM Y-speed
060C b u 0 WRAM Jump state
04BA w s 0 WRAM Armadillo X-speed