New pet currency added to old currency is still

The pet charm was renamed the shiny pet charm. The shiny pet charm can still be obtained from the BFA's previous pets against the world mission
A new currency has been added - the polished pet charm. You can get it from the BFA, like pets versus world missions.
Vendors selling combat pet items have changed their merchandise to a pet charm that needs to be polished as currency. For example, the Serr'ah of dalaran now needs to polish pet spells. Similar merchants selling such goods have also adjusted their prices.
Unique pets and toys still require shiny pet charms to buy. For example, shining pet charms can still be used to buy all the pets and toys of gyada kinso of dalaran.
Portable pet portal (set the maximum number of pets on your account to 1500. Each account can only be used once. Use it once. This is an achievement award for completing 30 pet battles against the world mission in the broken islands, which will be added to the merchant's sales list and purchased with polished pet charms. This is to avoid making players feel compelled to do previous world missions for the expansion pack. This way players can improve themselves with the current content. This will be added in future Beta patches
The purchase price of the ultimate pet training stone will increase from 45 to 60 pet spells.