“graded Togepi cards” is pretty broad. Are you looking for any languages? Only PSA, BGS, CGC, etc. or any grading company? Is there a minimum grade (i.e. only 10s, 8+, etc.)?
Apart from that, best of luck in your new broadened collection goal.
Yesterday I got an alert on cardmarket for the spanish Neo genesis Togepi.
As my heard started beating fast I unfortunately quickly realized I also had a alert on where I forgot to put the First edition as YES.
This means I am still looking for the last piece of my collection!