Kid Icarus: Uprising allows players to fuse weapons. In this process, elements of two old weapons are preserved as they are combined into a new weapon. In general, fusing two weapons of the same power nets a more powerful weapon than either of the two. This can be roughly calculated by a weapon's value, which is 100 or higher.
The results of weapon fusion are shown prior to the actual process, but even before that, it is possible to predict the results of fusions. For example, combining the same types of weapons will result in the same products, even if the exact qualities of the weapons differ. This makes it possible to create specific weapons via fusion.
It is also possible to fuse weapon-gems, although the result have to be paid with hearts. As long as a weapon is not unlocked (through progress in chapters or the tresure hunt), it cannot be created through fusion.
combinations for arms
| Crusher | Compact | Electroshock | Volcano | Drill | Bomber | Bowl | End-All | Taurus | Upperdash | Kraken | Phoenix | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Electroshock Arm | - | Angel Bow | ||||||||||
| Volcano Arm | Angel Bow | - | Phosphora Bow | |||||||||
| Bowl Arm | - | Meteor Bow | ||||||||||
| End-All Arm | Phosphora Bow | Meteor Bow | - | |||||||||
| Burst Blade | Darkness Bow | Crystal Bow | Sagittarius Bow | |||||||||
| Viper Blade | Crystal Bow | Angel Bow | ||||||||||
| Royal Blade | Hawkeye Bow | Sagittarius Bow | Phosphora Bow | Fortune Bow | ||||||||
| Silver Bow | Royal Blade | Optical Blade | Aurum Blade | |||||||||
| Meteor Bow | Optical Blade | Meteor Blade | Aurum Blade | |||||||||
| Doom Cannon | Dark Pit Staff | Thanatos Staff | Rose Staff | Knuckle Staff | ||||||||
| Raptor Claws | Laser Staff | Dark Pit Staff | Orb Staff | Rose Staff | ||||||||
| Artillery Claws | Dark Pit Staff | Thanatos Staff | Rose Staff | Knuckle Staff | ||||||||
| Halo Club | Aurum Blade | Burst Blade | Viper Blade | |||||||||
| Ogre Club | Aurum Blade | First Blade | Burst Blade | |||||||||
| Shock Orbitars | Cutter Palm | Dynamo Cannon | Aurum Palm | Viridi Palm | ||||||||
| Eyetrack Orbitars | Pudgy Palm | Ninja Palm | Viridi Palm | Great Reaper Palm | ||||||||
| Jetstream Orbitars | Aurum Palm | Viridi Palm | Burning Palm | Needle Palm | ||||||||
| Violet Palm | Boom Orbitars | |||||||||||
| Pudgy Palm | Guardian Orbitars | Shock Orbitars | ||||||||||
| Great Reaper Palm | Shock Orbitars | Eyetrack Orbitars | Jetstream Orbitars | Boom Orbitars |