*takes a deep breath*
Pikachu's gender is actually unconfirmed. It's voice actress Ikue Ootani, and Satoshi Tajiri said that they have not yet decided itís gender. Therefore meaning there's a possibility of it being a female. If you believe Pikachu has no chance of being female because of the keywords: always acted masculine, Buneary, and the tail.
Response 1. Pikachu never acted feminine ever!
- Here are some very interesting
frames of Pikachu dancing with a Raichu
Ironically enough, some of this scene was in the Pikachu (I Choose You) video.
You know there is no other...
I choose you!
Because you are my brother..."
^Yup, doesn't get any brotherly that this.
-In the old episodes, Pikachu had more of a motherly/sisterly relationship with Togepi than a fatherly/brotherly. The same with other young Pokemon like the Pichu Bros. and Hapinny
If Pikachu had no possibility being a girl, why would they bother to give it female roles?
Response 2. Pikachu isn't a girl because it doesn't have an indent on its tail!
- Please stop using this to back up Pikachu being male... Ash's Pikachu is from the Kanto region, not Sinnoh. Those differences don't apply to the previous regions. Even if Pikachu was male, it wouldn't be because of its tail, it would be because Pikachuís design was based of the original design of the species.
Response 3. Dawn's Buneary has a crush on Pikachu and Dawn has even confirmed it to being a girl. So that means Pikachu is a guy!
- Actually, Buneary's gender is unconfirmed as well. Buneary has a possibility of being male no matter how girly it may act. As long as its gender isn't confirmed it is still possible. For all we know, boy Buneary could be in the same catagory as male Jigglypuff, Wigglytuff, Bellossom, and Clefairy: girly-acting regardless of their true gender. This also goes for other manly looking Pokemon who can be female: masculine-acting regardless of their true genders. There are female Machokes but we wouldn't be able to tell them from the males. They all act and look exactly the same.
(Despite the fact that Buneary's gender isn't confirmed, for some reason the dub has confirmed it as a female.)
In conclusion, there's nothing wrong about thinking Pikachu is a boy and Buneary is a girl (That's your personally opinion) There is no actually proof for them being either gender. The only proof we have is the possibility of them being whichever. For Pikachu, we have male AND female hints. Unless their genders are officially announced or verbally stated in the original version.