Pokémon Black and White 2/Relic Passage

Relic Passage (South Entrance)
In here, we find the Relic Passage, or at least, on of the entrances to it. Immediately going left is an Escape Rope if you don't feel like walking out of the sewers to get out. Going to the far right, up past a scientist, and then left some is a, and item that boosts the power of Rock-Type moves. The scientists in here use to power up their Pokémon, which gives you a chance to attack. However, there aren't many trainers that are accessible from this entry way, so there is not much to fear.

Also in this cave is some new Pokémon. First is, which is probably the first thing you will encounter in this area. Where can evolve into, where it has good speed and attack stats (and even Sp. Atk, if you want to go 2010 World Championship Crobat), Woobat evolves into , in which it doesn't have too great of offense or defense, only speed. Its abilities are useless, in which the only useful one is its Hidden Ability, but you don't get access to that until the after game. Next is, the "" of the game. If you have someone to trade with, then is a pretty big threat, boasting a 135 Attack Stat, and a 130 Defense stat. However, if you can't trade, then you are stuck with, which is not bad by any means (especially with being a thing), but it does not harness its true potential. Lastly is, which is in a similar boat as Roggenrola. It is the "" of the game, as you need to trade to get it fully evolved. It has good Attack and defensive stats when evolved, but it misses out on a lot of the moves that you would get from breeding like and, but it is still a good Pokémon, none the less. It even learns and  level up!

Since there is not too much to see, there is not much point to staying, so returning to Castelia would be a good idea now, since you have not been healed for a while now, and you have a bit of a backtrack to a Pokémon center.