Cartoon Crossover: Before the Crossover

Cartoon Crossover: Before the Crossover is a 5-episode miniseries that spun-off from Cartoon Crossover. It aired on ToonNick from July 1st, 2014 to July 5th, 2014 and currently airs on CGChannel in reruns.

Plot
Before Timmy and friends built the Nicktoons treehouse, they were planning it from the first day they met.

Characters

 * Timmy Turner: A 10-year old boy who did most of the planning for the treehouse.
 * Zim: An Irken who helps with the treehouse.
 * SpongeBob: A sea sponge who helps decorate the treehouse.
 * Danny Phantom: A ghost-boy who helps with the treehouse.

Please note that these characters also appear in some Cartoon Crossover episodes.

List of episodes
1. Planning the Treehouse: Timmy starts planning to build the treehouse.

2. Getting the Supplies: Zim gets the wood needed to make the treehouse.

3. Building the Treehouse: Timmy and friends start building the treehouse.

4. Decorating the Treehouse: Timmy and friends decorate the treehouse.

5. Naming the Treehouse: Timmy and friends name the treehouse the Nicktoons treehouse.

Trivia

 * This is the only known Cartoon Crossover spin-off that is a story arc for Cartoon Crossover.
 * Every episode other than Episode 2 is named "(insert gerund here) the Treehouse)".
 * This was the second true original series for ToonNick; the first was Holez.