As per Zarel's words, if you want us to deregister an inactive account, make sure you fullfill at least one of the following conditions:Is there any way to get an account that hasn't been used in a long time, but is taken?
1. You have some sort of claim to the name. For instance, you have a trademark for this name, or you have a website or service with this name, or you have an active account on a social website (such as Smogon, YouTube, Twitter) using this name. By "active", our threshold is 50 by some nontrivial measure: 50 Twitter followers, 50 Smogon posts, 50 Reddit karma, etc.
2. You have contributed to PS or Smogon in some way. For instance, you have an accepted pull request to our GitHub repository, or you've contributed art, or you are a room owner or global moderator, or you have a Smogon badge other than Tiering Contributor, or something like that.