Can this reverse corner cut ?

Yes, The reverse corner cutting is also considerably good along with the corner-cutting.

Is it wr or wrm?

It is WR MagLev. So it is a MagLev version of WR M.

Does this cube slow down over time?

The cube will not slow down unless you keep it safe from dust (in a cube box or a pouch). As the dust particles tend to accumulate inside and mix with the luricant and slow down the cube. You can always dismantle the cube clean and reseemble it to get the same feeling as new.

Does this come with a proper plastic accessories box and holds the accessories in place?

No, it has a blue cardboard accessory box with all accessories in it.

Does it feature ball core and is ball core really that better for performance ??

This cube has a MagLev core and not a Ball-core.

Can the magnet be adjusted?

Yes, they can be adjusted.

Does this cube has strong magnets.

These magnets are highly powerful. The system incorporates Maglev technology, which leverages opposing magnets (magnetic levitation) to simulate spring force, effectively minimizing friction and eliminating any spring-related noise. Instead of traditional MagLev Core springs, this design features two magnets on each side, enhancing turning speed and allowing the layers to move with greater ease.

Does this cube has a Magnetic core ?

Yes, it does have a magnetic core.