According to that description, then they would be aliens disguised as humans, likely Orians, and then they would have to be added to that enemy's page. However, this wiki bases all its information on the original Japanese lore, leaving the Western retelling only as a side note.
It is never explained the method used by the aliens to brainwash humans, it could be either by parasitizing them or by telepathy. If the former was the case, then they would be human soldiers (Greeders) at an advanced state of infection; and since their attack behavior is the same, there is still no necessity to create an individual page for them.
Red Falcon's alien cells, which was used to revive Lance in Shattered Soldier, are genetically programmed to safeguard Moirai Relic at the cellular level. Its genetic program cannot be defied or altered, as Lance had to obey its alien cell in his body and was revealed to be forced to fight against Bill. Blood Falcon, the successor organization to Red Falcon, was no exception.
but I don't know if this info should be written in Alien Cell article or Red Falcon.
It can fit in both (and even in Blood Falcon), as long as the information is brief, concise and the articles are not completely rewritten (also, remember to use proper grammar - always re-read what you write as many times as necessary before publishing your edits).
Also, I know this is not the case but I thought it would be better to tell you before any eventuality: remember that all characters and events in Contra: Return take place in their own alternate universe. Refrain from adding any Contra: Return lore to the main characters/events pages.
also, through that source I found out that Alien-Lance actually wanted to die at the hands of Bill: he wanted Bill to stop him since Lance couldn't stop himself. (should the story expands to EX ending/true S ending)
If it's not an actual stage then it should be removed. Also, please refrain from removing variables from infoboxes, even if they are empty of if they point to "N/A" data.
By the way, please consider switching to the Source Editor instead. You may have noticed that every time you edit, lines are either added and/or removed either before or after templates. This is a bug that originated from a recent update to the other two editors (Visual and Classic rich-text). The Source Editor lets you edit a page's code in its raw form. It may be hard to get the hang of it at first but in the end it's way more rewarding and it will surely save us a lot of unnecessary editing in the future.
In most games, bosses usually only have one or two standard themes which are used in encounters thorough the game, so they don't really have a specific theme with which to relate each one. However, if you still want to add them, I would suggest doing so in the "Notes" section.
Hello LaVey I'm just exploring and reading wikis until I saw that many users: Beebozeelust, Beerazo, Piparo, Yevaloyo were all blocked. What happened or what did they do that caused them to get a block?
I'm going to stop you right there because you're not fooling anyone. As someone who has been banned on several accounts already, you're doing yourself no favors circumventing your bans and creating several new accounts. We all know you're the same user based on the pages you edit and way you conduct yourself.
I don't know how many times you have to be blocked, but I want you to stop harassing LaVey and I want you to stop coming on all related wikis, because at this point, you are just causing a headache for everyone involved.