They stopped for a while because they were shooting for the 2nd season.The first episode in the 2nd season is "The Con Man." Mike's cousin,Connor plans to infiltrate the dojo,and after he fails,Mike,Amanda,and Owen must get Mike's mon after Conner grabs it without Mike noticing during a fight.Connor tricks the ninjas into thinking that the reason he is trying to take them down is because his parents are held hostage by Mike's grandfather's brother,Kagema Fukanaga.But while fighting the Ishina,and after realizing that Connor was lying,the ninjas pushes Connor into a cargo box headed to Madagascar after taking back Mike's mon.
Ninja Taro happened in 1991.
I-Ninja happened in 2003.
Hamster Heroes happened in 2005.
Fruit Ninja happened in 2010.
Sega Ninja happened in 1985.
Ninja Crusaders happened in 1990.
Ninja Warriors happened in 1994.
The Ninja Warriors happened in 1988.
Ninja Rabbits happened in 1991.
Ninja Hayate happened in 1984.
Ninja Commando happened in 1992.
Ninja Combat happened in 1991.