I installed the pet fcitx64_4.2.7-en-zh-bionic-21.2.7.pet from viewtopic.php?p=95296#p95296
It was missing in the list of the installed pets in PKGget so uninstallable by PKGget (viewtopic.php?p=130049#p130049)
PS: During (or at the end of) installation of the pet, X rebooted