Some provided by Vhyrro, and the rest figured out by me with the help of the source code.
SystemID NES
0307 b u 0 RAM X sub position - "robindx"
0308 w u 0 RAM X position - "robinxl", "robinxh"
0311 b u 0 RAM X speed - "runcount"
030A b u 0 RAM Y position - "robiny"
0318 b s 0 RAM Y speed - "robingravity"
0 S _ 1
030C b s 0 RAM State - "leftright"
030B b u 0 RAM Screen relative X position - "robinonscrx"
030D b s 0 RAM Old state - "oleftright"
030E w u 0 RAM Old X position - "orobinxl", "orobinxh"
0310 b u 0 RAM Old Y position - "orobiny"
0312 b u 0 RAM Title screen value - "robindir"
0313 b u 0 RAM Running animation - "robinanim"
0314 b u 0 RAM Firing animation - "robinfiring"
0315 b u 0 RAM Crouching animation - "robincrouch"
0316 b u 0 RAM Height - "robinheight"
0317 b u 0 RAM Is jumping - "robinjumping"
0319 b u 0 RAM Face animation - "robinlook"
031A b u 0 RAM On ladder - "robinladder"
031B b u 0 RAM Ladder reclimb timer - "robinladdercounter"
031C b u 0 RAM Invincibility timer - "robininvinc"
031D b u 0 RAM "robinbehind" - unknown
031E b u 0 RAM On first jump frame - "robinjustjumped"
031F w u 0 RAM Respawn X - "oldxl", "oldxh"
0321 b u 0 RAM Respawn Y - "oldy"
0322 b u 0 RAM Respawn on ladder - "oldladder"
0323 b u 0 RAM Death countdown - "killed"
0324 w u 0 RAM Arrow kill X position - "deadarrowx"
0325 b u 0 RAM Arrow kill Y position - "deadarrowy"
0326 b u 0 RAM Used arrow timer - "deadarrowcount"
0 S _ 1
0009 b u 0 RAM Vertical screen scroll
000A b u 0 RAM Horizontal screen scroll
0042 b u 0 RAM Room ID
0048 b u 0 RAM Life count
0049 b u 0 RAM Heart count
0640 d u 0 RAM Key data bitfield
0650 d u 0 RAM Enemy data bitfield