Ninjala Beast Soul

(Sequel to Ninjala, also crossover with Splatoon, Toca Life Stories and many others that will be revealed later on, AU where ninja are half-animal and have elemental powers due to the power of Shinobi and they are partnered with elemental animals infused with the Power of Shinobi, Ninja Beasts)
Years after Ninjala, the ninja moved on from the WNA and Space Ninja incident while a new WNA replaced the old one and now manages the Ninjala tournaments, but a new threat comes from the Shadow Beasts, 6 young Ninja descendants, who haven't yet gotten their animal halves, elemental powers and ninja powers, discover legendary Ninja Beasts, they encounter the original Ninja and they confront the Shadow Beasts, but a life changing event bonds a lion Ninja Beast called Leoflash to one of the six young descendants, a girl named Alexa, they merge into Burst Leo, a Ninja Hero, a fusion between a Ninja and their Ninja Beast, but their first battle causes a energy wave to hit the world, reverting the 8 Ninja back into children, freeing a Ancient Ninja Beast with an unknown past and scattering the nine elemental Ninja Beasts beside Leoflash, now the six kids, the Ninja Beast Zerker and the 8 Ninja, now forming the team called the Guardian Ninja, must find the nine Ninja Beasts, fight the Shadow Beasts and save the world.