I haven't tried a full team of Intimidators, but I did try with 3 before I think, but not in Subway (it was in Gen 4 Battle Facilities). It did ok. I think I recall it being not such a good matchup against fast special attackers like Raikou and Latios. Not too surprising since the best Intimidators in Gen 4 are like Salamence, Gyarados, and Staraptor (I didn't use a Salamence though. I think I used a Luxray).
I would imagine that for Gen V, you'd definitely want something that can OHKO Defiant Bisharp. Fortunately, plenty of Intimidators can do that (Staraptor/salamence have their fighting moves, Arcanine can Fire move or close combat, or double quake with salamence/gyarados even).