>>12929154> in the west the title is used for recognition and the subtitle is meant to catch the eyeWhich is why the Pokemon title is in eye-catching yellow. In fact, that's why MOST logos (particularly road-side restaurants) are either yellow or red, or both.
The western title is also meant to draw lines between all the different products, showing they're all related and released by the same company (thus, the Pokemon logo on backs of Pokemon TCG cards). If it was different, it would just confuse Western customers, thinking maybe it's some kind of knock-off or competing product (like the "Monsters in My Pocket" brand or Digimon).
Japanese design sensibilities are different than the West; as mentioned above, if the title isn't different, then it doesn't mean it's something new to them. Also:
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http://www.emeraldinsight.com/journals.htm?articleid=1603582> Japanese consumers' need for uniqueness consisted of avoidance of similarity, unpopular choice and creative choice. The consumers' need for uniqueness was negatively related to the perceived quality, whereas the creative choice was positively related to the emotional value in perceptions of the US apparel brand. The perceived quality decreased purchase intention, while the emotional value increased purchase intention. 
