Alliteration theory suggests a naming theme
ch1: Card Kingdom
ch2: cyber city
ch3: TV time
ch4: second sanctuary
ch5: (predicted) flower festival
Misplacement theory simply observes that there tend to be characters from some chapters who appear in other ones
ch1: Ribbick/Pippins, both in ch3
ch2: Ramb, also in ch3
ch3: Mike, in ch4
ch4: Bibliox, in ch3