Flycast Atomiswave Service Button & transparant character

Is there a way to enter the Service Mode with Flycast in Metal Slug 6? I want to enable the blood (red) within the game.

I’ve also noticed that in Fist of the North Star, when i Upscale the Texture (xBRZ) more than x2 the opponent become transparent? It’s really noticeable in the first opponent Heart who has a huge belly.

Is there a reason why Upscale Texture (xBRZ) doesn’t work on Samurai Spirits? It’s a sprites based game like Metal Slug. Thanks in advanced.

Enable Allow Naomi service buttons in Quick Menu.
IIRC you can than enter the Service Mode with the L3 button.
Use R3 to cycle thru menu items.

Thank you for the reply. I tried that but for Metal Slug 6 (with Flycast), i don’t get the blood/violent mode in the Service options. If anyone has had luck please share.

Region set to USA maybe ? A tip : never set anything to USA in any emulator if you are looking for violence/gore/blood, everything is generally censored.

Edit : nvm, it doesn’t change anything for mslug6, maybe there is no such mode in this game.

Edit2 : it seems there is a hidden method :