Sounds pretty good

On a note of templates; can you copy the code for the infoboxes into MediaWiki:Monobook.css too?

You mean copying from MediaWiki:Wikia.css

/* Added CSS for portable infobox styling - used by Pinkachu/Staff for example of how CSS styling can be used to alter the Portable Infobox's individual elements.  */
.portable-infobox .pi-header  {
  line-height: 10px;
  background-color: #003600 ;
  text-align: center;
  color: #B9DDB9;
}
 .portable-infobox .pi-title  {
 line-height: 21px;
 background-color: #003600 ;
 text-align: center;
 color: #B9DDB9;
}
.portable-infobox .pi-image {
 background-color: #000000 ;    
}
.portable-infobox {
 background-color: #111409 ;
 color: white;
 border-style: solid;
 border-width: 0px 2px 2px 2px;
 border-color: #000000;
 border-radius: 0px 0px 12px 12px;
}
.portable-infobox .pi-item-spacing {
 padding: 3px 10px;
}

Instead the whole section labeled as /* Infobox template style */, right? Because from the looks of it monobook infoboxes looks pretty nice atm, all things considered.

p.s. the whole "Forum formatting (by -Algorithm & -Splaka)" is it still relevant? iirc that class there has been used in the old forums, but I might be wrong.

Yes. The infoboxes should be identical across all skins of the wiki.

I would, but right now I don't have my computer with me and it's not really something I can do on mobile. I'll try and see if Skyzy has time to do this. 

Thanks for pointing it out anyways!

Sweet, thanks!

I copied the portable infobox code. Did you also want the infobox style copied?

As far as I am aware non-portable infobox are no longer in use. So the whole /* Infobox template style */ section from MediaWiki:Monobook.css and /* Basic common style for infoboxes on the 100 Wikia */ on MediaWiki:Wikia.css can and should be removed.

Thanks Skyzy for handling this.