The locket is the main character in Xolga and Mr.Toko series. It digested both Xolga and Mr.Toko and turned them into a talking teddy bear (Xolga) and a weird egg shaped creature (Mr.Toko). After that it started to fly away into different universe leading Xolga and Mr.Toko into chasing it.
The locket first appearance was Xolga and Mr.Toko episode 1 where in the warehouse after the other main characters open the locket's shell and got turned into different creatures and the locket shell poofed into Wonderland (episode 2), next The Kingdom of Hepcatsis (episode 4), and Cigam (episode 5).
In the Finial episode of Xolga and Mr.Toko it appeared that inside the locket was a indigo man-eating creature. It had put Xolga into a dream. It had stated that it was hungry and likes to play "pranks" on people when its hungry. The locket was confused why Xolga did not like his dream, but after a conversation between those the locket disappeared leaving Xolga to fall to his death. Back outside after Mr.Toko saved Xolga the locket flew away. Xolga deiced that it will be impossible to get their body backs for good so Mr.Toko and Xolga continued their adventure.