People discussing heal items: Get a Pokemon with Wish.
I couldn't figure out how to activate the battle bot whatever for Shoddy Battle?
Mainly what I need is a server with teams of similar skill levels (I know how to play but none of the competitive tactics or how to use the special items like choice items effectively)
The Pokemonexperte Server on Shoddy Battle has a battle bot you can challenge by left clicking on it in the player list, right-clicking on it once its highlighted, and selecting "challenge". I'm not sure what skill level it plays at, but you can always test different techniques against it.
Choice items are really easy to use once you figure out what to do and what not to do with them equipped. For example, it's best not to use any non-attacking moves unless you have a very carefully planned out strategy, with the exception of Trick (switches held items, can be useful for crippling one of their Pokemon with only one or two attacking moves).
With Band and Specs, you're mainly just packing a wide range of powerful moves that you can come in and spam until they switch in something that resists you. For example, if you get a Latias with Choice Specs and start using Dragon Pulse, they might send in a Steel type to take the hits easily. Therefore you're required to switch Latias out and come in later if you don't want it to be worn down. But, if you also teach something like HP Fire to Latias, then you can predict their switch into the steel type and hit it with a super-effective attack.
Scarf is used roughly the same way, but more often with non-attacking moves (although still very rare, since you have to switch out after). The main purpose of Scarf though is to come in, outspeed your foe, and take them out with a super-effective attack. For example, if they have a Gyarados who's used Dragon Dance, it's going to be faster than a lot of your Pokemon and can kill them. If you switch in, say, a Scarfed Jirachi after having one of them faint, you can outspeed and OHKO the Gyarados with ThunderPunch (best Scarf revenge killer IMO).