Golden Lion King + Meowth Slash = Nemea, Gaiura + Aktek = Krubak, Charizard + Beagle = Flame Bird, Phoenix King + Hell Dragon = Igniru, Crown Horned Python + Steel Dragon = Stim, Kudraine + Dracula = Galau, Bonidra + Icefang Tago = Snowman, Bosraosaurus + Steel Dragon = Kurooola, etc., there is no reference for synthesis. Rules, all are fixed synthesis formulas.
Pet Kingdom stand-alone version combined table
Golden Lion King + Meow Meow = Nemea
Gaiura + Aktek = Krubak
Charizard + Eagle = Flame Bird
Phoenix King + Hell Dragon = Igniru
Crown Horned Python + Steel Dragon = Stim
Kurdelin + Dracula = Galau
Bonidra + Icefang Tiger = Snowman
Boss La Dragon+Steel Dragon=Kuruola
Bulbasaur seeds + trumpet sprouts = root grass
Gaiura + Aktek = Kruba
Snowman + Steel Dragon = Vajra Kumar
Nemea + Shadow Scorpion = Amireo
Bird + Cunning Crocodile = Frozen Bird
Pudding Knight + Freeze Bird = Norseman
Krubak+Kuruola=Vaid
Pikachu + Chocobo = Lightning Bird
Meku Silu + Ancestral Tree = Driam
Randtazzi + Amireo = Krubaka
Ke Mewtwo + Darkrai = Dark Mewtwo
Rolls Royce + Iron Lion = Earth Rock Dragon
Moon Palace Jade Rabbit + Lingming Stone Monkey = Snowman