Similar to my Terrawhalno? I think the "a" makes a difference since it makes the word flow, and again, terra can sound like terror, attributing CAP9's Dark-type.
Nardrill - Narwhal + Drill (Sounds too much like Beedrill, though)
Whaldon - Whale + don [Assembled with "tun" in tunneling?]
-Terywj
Heh, looks like most of us are going to fall into either the 'narwhal' or 'drill' base camp.
What about Savadrill? It's rather straightforward for a Pokemon whose design doesn't leave you guessing as to what he's all about. Also, you can't say it without saying 'Savage' and 'Drill'. It's a 'savage drill', guys, and the large mammal attached to it is merely ornamental...
If its over 10 letters, just pull a Feraligatr (Feraligator)!