The Missing Tree is the fifteenth video uploaded in Season 4 for SPB Movies.
When Mario's tree goes missing, he interrogates everyone to find out who stole it.
- Secret Agent 00 SquarePants | Title card.
- Super Pipe House | "Ah, everything's good."
- Dramatic Cue (b)  | Mario goes outside.
- Fates | Mario is sad about his tree being gone.
- Lite Conversation | Luigi gets home.
- People's Court | "It's time for Detective Mario!"
- Detective Mario | Mario goes over his list of suspects.
- Tomfoolery | Mario interrogates Grandpa Luigi.
- Secret Agent 00 SquarePants | Mario goes to interrogate Yoshi.
- Wooden Bear | Mario interrogates Yoshi.
- Piranha Plant's Lullaby | Mario in Peach's bedroom.
- Dramatic Impact (b)  | Peach wakes up.
- South Pacific Island II | Peach cries after being accused.
- Hawaiian Party | Mario interrogates Daisy.
- Stack of Leis | "Now I see why Luigi doesn't like her!"
- Mushroom Bank | Wario and Waluigi searching for treasure.
- Gates of Goomba Castle | Mario interrogates Wario.
- Angry Bowser | Bowser is angry at Koopa.
- Cartoon Sting 1 | Mario interrogates Bowser.
- Krusty Krab Tango | Mario hears a strange noise.
- Slide Whistle Song | Mario beats up Mr. Krabs. 
- Stack of Leis | Mario accepts that the tree is gone for good.
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