|Journey to the Center of Mt. Spew|
|Season 1, Episode 20|
|Air date||May 2, 2011|
|Written by||Dan Cross & David Hoge|
|Directed by||Victor Gonzalez|
"The Trouble With Doubles"
"Kings of Legend"
Journey to the Center of Mt. Spew is the twentieth episode and the season finale of Season 1.
It's the kings' birthday and for their royal present, they each get one wish that will come true. Right before blowing out the candles, Boomer learns that Brady has been bragging to the entire island that he is the older twin. Boomer uses his wish to find out the truth about who was born first, while Brady's wish is that Mikayla compliments him all day. Boomer travels to the center of Mt. Spew to meet with the volcano's Oracle and learn who is the older king, but the younger brother will no longer be co-king if it is known who the older brother is. So Brady, Mikayla, and Mason chase after Boomer.
Brady: Make way for the firstborn!
Boomer: I wished there'd be someone on this island who could tell me who was older.
Mikayla: Once you find out who is older, that twin will be king, and only that twin.
Mikayla: King Boomer is gone! And King Brady's hair looks fantastic. Ugh!
Brady: We have to stop him, you know, before he finds...out that I'm older, because then he wouldn't be a king. He would just be a lowly peasant... No offense, peasants.
Brady: Boomer come back!
- The title is a parody of the 2008 film, Journey to the Center of the Earth, adapted from the novel by Jules Verne.