Quite ironic really, since gettin' gold in the Battle Frontier(s) is one of the most difficult objectives in an RPG ever.
If you have all legendary pokémon, then call me again!
Yep, that's quite the problem I have playing Pk black version...
Legendaries aren't really overpowered, they're strong, yes, but I wouldn't go as far to say overpowered. Not saying I like to use them.
^ An outdated opinion popular among biased newbies, amigo.
Some legendaries aren't even that strong, in fact. Take for example the miserable Entei; it has a very high Attack 'n HP stat, sure, but it's movepool is ****in' awful. It's best moves are effectively Strength and Fire Blast (which doesn't even use it's higher Attack stat; also, Entei's Special Attack stat is LOWER than a Charizards!). Your starter Fire type of any generation is quite a bit better than it even though Entei has a naturally higher stat total.
There's no such thing as a weak legendary, but to say they're all overpowered or uninteresting is a load of shit. Quite a few legendaries have very interesting designs 'n back stories. Unfortunately, the imbecilic children we all were at one point got attached to the notion that legendary Pokes are for n00bs only 'cause they're too strong, or some false garbage like that. Not every single legendary is a bloody Mewtwo in terms of power (half don't even come close to said example's omnipotence).
Isn't ROTOM a sub-par pokemon when it comes to stats? I remember catching one and wondering why I bothered in the first place. Diamond and Pearl I believe. Or I was just annoyed that it was a low level and didn't bother to level it...