Definition: Rewrite each original sentence in order to make it easier to understand by non-native speakers of English. You can do so by replacing complex words with simpler synonyms (i.e. paraphrasing), deleting unimportant information (i.e. compression), and/or splitting a long complex sentence into several simpler ones. The final simplified sentences need to be grammatical, fluent, and retain the main ideas of their original counterparts without altering their meanings.
Input: In the manga, Blaine is a former Team Rocket Scientist who had combined the DNA of Mew with his own DNA, creating Mewtwo.

In the manga, Blaine was previously a Rocket Scientist who added together the DNA of Mew with his own DNA to create Mewtwo.