Question about Mavlink support for Pixhawk

I am writing you to enquire about the mavlink support for pixhawk.
I am using as device the Pixracer V1.0 Autopilot and developing a mavlink parser for the telemetry data sent by the device.
Which mavlink version is used by this device?
Is there any documentation about it?
I have not found any documentation on the web.
Moreover, during the first tests, I have detected some mavlink messages that are not present in the official mavlink specification of the message set (<?xml version='1.0'?>3).
These messages have the following IDs: 65, 116, 125, 150, 152, 163, 165, 178, 182, 193, 241.

Thanks in advance.

PX4 uses both mavlink v1.0 and v2.0 and negotiates the version. It’s a work in progress, but here’s some newer mavlink documentation.

Does PX4 FW support all Mavlink command in common.xml or does it has more command that it support?

Is there a place where i can see a complete list of the all the command (including msg ids) that PX4 support?