Sony AIBO Explorer User Manual page 23

Boost mode
In "Boost mode", AIBO becomes super energetic
and acts with more zest than normal.
To put AIBO into Boost mode, you have to talk to
AIBO frequently, or allow AIBO to become
excited through communication with another
AIBO. Even though AIBO is sulky or irritated, it
enters "Boost mode" when you talk to it
frequently or it has a very enjoyable conversation
with another AIBO.
After expending much energy in Boost mode, AIBO may be too exhausted to
respond to you for a while, but you do not have to worry about it. After a while, it
restores to its normal condition.
If you happen to scold AIBO in Boost mode because it romps about in your room,
it becomes sullen. However, it regains its normal temper and acts in the usual way
after a while.
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