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I'm having the exact same problem. Using a Chromebook and ever since around noon yesterday, it's been saying that it couldn't connect to server. I haven't tested this on any other web browsers, but does anybody have any tips besides what's already been said - nothing has been working.
I just started Pokémon Showdown, and ended up just going with my favorites. My team right now is...
Zygarde @ Aguav Berry
Ability: Power Construct
EVs: 252 Attack, 252 Speed, 4 Special Attack
Careful Nature
Core Enforcer
Extreme Speed
Thousand Arrows
Earthquake
I chose Zygarde because back in...