A way to tell what moves are illegal

[Tomahawk]

Hi, as the title suggests, I want a way to find out which moves are illegal online as i normally reckon my team is fine before I try to go online. 

[Swampellow]

Any move you cannot get legitimately ingame is illegal. Aka TMs that are not available on mons that do not learn them naturally.

[Tomahawk]

Some of the pokes i have I got in a trade, so its a little ambiguous to me...

[Swampellow]

Just check their movesets online to see if they are legal.

[HUEnd]

It's not like "Earthquake, Calm Mind, etc. moves are illegal".

 

As Swamp stated already, a move is considered illegal if certain mon has X move that is not supposed to have as of the current version (simply by being unable to learn it but it has X move for some reason or if it's from a legitimately avaiable TM).

 

Some examples:

- A Granbull knowing Earthquake is considered illegal, while a Diggersby knowing Earthquake is considered legal;

- Boomburst Porygon-Z is illegal while Boomburst Noivern is considered legal.

[Walpurgis]

Basically the pokemon has to be able to learn the move through legitimate means in the game. All level up and egg moves are legal, just some tm/tutor moves are listed as illegal on pokemon that dont learn those moves through other means.