Sounds like the Matt Hatter Chronicles.
Matt Hatter Chronicles, is a British-Canadian-Indian animated series produced by UK's Platinum Films, Arc Productions, and Dream Mill. It began airing on Teletoon on 8 September 2012.
It aired on Cartoon Network in India on 19 May 2014. Season 3 premiered 13 April 2015 on Cartoon Network (India).
The main character, Matt, discovers a portal to a multiverse of other worlds in his family's movie theatre. His grandfather becomes trapped in said multiverse, and Matt goes in to rescue him:
Matt Hatter is an ordinary child who discovers that the monsters of his family's horror movies are alive in another dimension called "the Multiverse", controlled by the nefarious Lord Tenoroc. This dimension can only be accessed through the Notting Hill Coronet, his family's movie theater. With his grandfather Alfred trapped inside the Multiverse, Matt, along with his new friends Roxie and Gomez, must capture the movie monsters, save Alfred, and restore peace to the Multiverse.
His main allies are Roxie and Gomez, whom he meets shortly after venturing into the multiverse for the first time. Roxie wields a staff, and Gomez is a little shorter than the other two:
Roxanna "Roxie" Alexis (voiced by Larissa Murray): A 13-year old pink skinned and magenta haired girl from the Multiverse who is a Tracker of Team Hatter. She wields a staff that was created from the ancient Tree of Life by Gomez, and holds an amber crystal on the end that calls Matt when the Multiverse is in danger.
Alejandro Diego Gomez Montero (voiced by Marcel McCalla): A 12-year-old boy from the Multiverse who is the Keeper of Team Hatter. He wields a weapon from the Cave of Secrets that used to belong to his father.
Here's the first episode. You can find more on YouTube: