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Eh. They're fairly easy to emulate, so there's no need to shell out the cash just to end up with something you don't like/really care for (even if you went through the hassle of returning). I don't think Ultra Sun/Moon are really worth grabbing since you've already played the regular versions. Sword/Shield are decent enough romps, though admittedly I played the game with the EXP share modded off since I'm a stickler for 6 team members and didn't want to be overleveled (and the game keeps you fairly evenly levelled with the story, if you're curious, up until the last-minute Champion slight level spike). The DLCs aren't really necessary but are a nice add-on you might as well get if you're emulating, but I wouldn't go out of my way to pay much for them if you're actually purchasing a copy. Legends was surprisingly fun, but might be hit or miss depending on if you care for the basic gameplay loop of exploring the open areas and catching pokemon and whatnot.