REALLY HAPPY WILLY looks similar to his original counterpart, but he has human eyes which is bleeding and his gloves are red in blood
- "Why aren't you HAPPY...?"
- "What is sadness...?"
- "Hi there..."
- "Nothing is more fun than happiness and killing..."
- "STAY... HAPPY..."
- *Screaming in Suicide Mouse's voice*
- REALLY HAPPY WILLY is quite similar to Extremely Happy Mouse.
- His jumpscare screech will sound like Photo-Negative Mickey's jumpscare, but in a demonic way and slowed down.
- REALLY HAPPY WILLY's voice is similar to Willy's voice, but his voice is loud and demonic
- After getting jumpscared by REALLY HAPPY WILLY, the game will somehow crash
- It's unknown on how to active HAPPY NIGHT or making him appear in the title screen
(Anyone wants to voice act REALLY HAPPY WILLY?)