Btw the ruined mansion is apparently still in there (sans plastered maid accessory). For those with artmoney and interested in finding the memory values to select which stage:
Stage Select:
0 Random Select
1 Iron Maiden
2 Artificial Eden
3 Night of Walpurgis
4 sabbath
5 Classic home.Evening party
6 Classic home.Invade
7 Tohno's mansion.Main gate
8 Classic home.Huge library
9 Magical Kohaku Prison
10 Tohno's mansion.Central garden
11
12 Battle field
13 Temple of the Seventh Heaven
14
15 Hologram Summer
16 Stalight crossing
17 Back alley
18 Midnight Park
19 Through the Looking-Glass
20 Witch on the Holy Night
21 Classic
22 Forest of king Cruel
23 Doctor Kohaku Garage
24 Great Cats Village
25 NECO no you may
26 narvous stray vanguard
27 red moon scherzo
28 lost world's Biography
29
30
31
32 Battle field (Damien Armies)
33 NECO no you may (G666)
34
35 Classic home.Evening party (?)
36 Classic home.Ruins
Blank entries mean the selected stage is blank: you get a black background which is nice to work with if you're after to rip sprites and stuff. #35 seems to be a repeat of 5. No clue why. 36 is obviously the stage I mentioned at the beginning of the post, and the last one it seems.
EDIT: Clearup about the blank stages. You need to get to a regular stage with the characters on the screen, then go back to the select screen and select a blank one. This'll allow the characters to show up on the screen then just fine.