EM Wave Change

An EM Wave Change, known as a Denpa Henkan (電波変換) in Japan, is performed when an EM being fuses with a compatible human. This creates a more powerful being, able to interact with both other EM beings and regular humans.

Characteristics
During EM Wave Change, the human becomes part of the wave world, and is thus subject to the same rules as other EM beings. The EM being is then able to give its powers to its compatible human, and the human is able to use Battle Cards as actual weapons.

Fusion
During Wave Change, the EM being and human are combined into one consciousness, though this process can take time even if their bodies have fused (and it sometimes just freezes if the two are resisting assimilation). Two notable exceptions to this are Geo Stelar with Omega-Xis as well as Sonia Strumm with Lyra. Some EM beings, mostly FM-ians, will try to take their human partner as a host body, and attempt to subsume their human's consciousness completely.

Solitary
In the second game and during the Tribe season of the Star Force anime, Solo is shown being able to EM Wave Change without the aid of an EM being from which to borrow his power. Through simple willpower, and the effects of an "ancient Star Carrier," this allows Solo to become the EM being Rogue. However, he gains his own EM being named Laplace in the third game of the series. Laplace, however, does not aid in Solo's transformation. He becomes a very powerful sword.

Transcoding
During the third game, the method of Wave Changing was changed. Because EM-Beings were converted into Wizards due to the Hunter-VG, they were unable to EM Wave Change in the normal way. Instead, Wizards could only fuse with their human counterpart using the Transcode, which instead of normal EM Waves, used the Satellite Server, which WAZA has built, and has registered every human who is able to Wave Change in a project known as Project-TC. Transcode resembles Cross Fusion more than EM Wave Change, because the Transcode uses data, rather than simple EM Waves.

History
In the games, the protagonist Geo Stelar has to find spacial distortions (signified by orange portals). It is not shown whether other characters must keep to the same accord.

In the anime, however, any EM being and their compatible human can EM Wave Change by shouting the phrase "EM Wave Change! [Name], On-Air!" in a similar way to the Megamerge technique.

In the third game, Geo(and all others who have the ability) can Wave Change in any area, however the method has changed. Upon Wave Changing for the first time in the game, the Wave Changed being is assigned a "Transcode", and an ID number, as well with a Code Name (For Mega Man in the Japanese game, the Code Name was "Shooting Star"). (Mega Man's is 003.) After that, the user must shout, "Transcode! (insert name of Wave Changed form here)!" in order to transform. Accessing the Wave Road is done through a Wave Station, which in previous games was done by wave changing in a wavehole.

Unregistered, and thus illegal Wave Changes still use the old phrase, however.

Trivia

 * EM Wave Change is similar to the Cross Fusion in the Rockman.EXE anime, and the background used when a character is doing an EM Wave Change in the anime is the same as the Stream background for Cross Fusion. The major difference is EM Wave Change doesn't shatter on emblem damage like Cross Fusion.
 * Another similarity EM Wave Change has is the sync rating. Once, Geo's mind was in turmoil when Cygnus, using Tom Dubious' body, told Geo that Omega-xis killed his father. This caused Geo's EM Wave Change to detoriate. This is similar to when Lan got into an argument with Megaman while Cross Fused, and couldn't maintain the Cross Fusion due to low Sync ratings.