Skullomania (スカロマニア, Sukaromania), also named "Skullo Mania", real name Saburo Nishikoyama (西小山 三郎 Nishikoyama Saburō) is a DLC guest character from Arika's Fighting EX Layer and Street Fighter EX (the latter being co-developed with Capcom) in SNK Heroines: Tag Team Frenzy. He is voiced by Yuuko Kaida in his female version.
- Amusementive Crime ~SNK HEROINES Edit~ - SNK Heroines: Tag Team Frenzy
- Skullomania's reveal trailer in SNK Heroines is named "Friend or Foe? Enter the Skullolady!", which is a reference to Skullomania's ending in Street Fighter EX3.
- Skullo is the second male character to be swapped into a female form for Heroines, the first being Terry Bogard, then followed by Iori Yagami (as Miss X, who originally debuted as a cross dresser before being turned into a true female).
- Conditionally, both of two former male fighters appeared in Arika's own fighting game Fighting EX Layer.