#450 Kappa Avenger
Fusions by Outcome
#073 Kairyu-shin
#450 Kappa Avenger +  #011 Sword Arm of Dragon =  #073 Kairyu-shin
#073 Kairyu-shin

#448 Spike Seadra
#450 Kappa Avenger + #004 Baby Dragon = #448 Spike Seadra
#450 Kappa Avenger + #007 Winged Dragon #1 = #448 Spike Seadra
#450 Kappa Avenger +  #010 Blackland Fire Dragon =  #448 Spike Seadra
#450 Kappa Avenger +  #031 Koumori Dragon =  #448 Spike Seadra
#450 Kappa Avenger +  #298 Wicked Dragon with the Ersatz Head =  #448 Spike Seadra
#448 Spike Seadra

#460 Bolt Escargot
#450 Kappa Avenger + #045 Oscillo Hero #2  = #460 Bolt Escargot
#460 Bolt Escargot

#639 Amphibious Bugroth
#450 Kappa Avenger +  #275 Ground Attacker Bugroth =  #639 Amphibious Bugroth
#639 Amphibious Bugroth

#647 Hyosube
#450 Kappa Avenger + #070 Fiend Kraken = #647 Hyosube
#450 Kappa Avenger + #243 Water Element = #647 Hyosube
#450 Kappa Avenger +  #445 Guardian of the sea =  #647 Hyosube
#647 Hyosube