[size=14pt]Dancing with coffins at burials[/size]
This traditional, ironically, existed in parts of Igboland but the practice was strictly in the case of murdered victims in which the pallbearers were 'empowered' and after some hefty and great movements swaying side to side the spirit of the deceased was believed to lead the procession to the murderer, where either some mystical calamity befell them or they confessed.

[size=14pt]Umu Asebi and Uniform[/size]
The practice of wearing 'unifrom' at weddings and funerals is a chiefly Lagosian influence in addition to the institution of Umu Asebi, bridesmaids, at weddings. The clue is in the foreign names.

[size=14pt]Eze - Transformed Warrant Chiefs[/size]
There were a few religious political figure heads know variably as either Eze, Obi, and or Igwe who were mostly elective from special families and had lesser powers than some conventional kings, apart from those all the other so called "Eze" are an invention and institution propagated by the British in order to maintain greater control of the largely autonomous Igbo by introducing them as 'Warrant Chiefs', basically lineage heads who would look after tax collection for he British. When there were no more than 50 Eze or Obi before the British, there are now over 600 so called Eze in Imo State alone, an area that previously had zero kings and only representatives like the president of Ugwuta (Oguta). Most of these thousands of kings are no older than 20 years old, and some come from the warrant chief system. For the most part their position as so called Eze isn't recognised in the customary law of the Igbo people.

[size=14pt]Coral shawls and head dresses[/size]
Much of the coral shawls and head dresses women were today, and even the so called crowns the "eze" wear today are an Edo influence, the crown especially an Urhobo influence. There was extensive use of coral in Western Igboland (Anioma), but apart from that many Igbo people today do not really adorn themselves like their ancestors who wore mostly mixtures of ivory, bronze, copper and other metals and stones.

[size=14pt]Weddings[/size]
This isn't so much an outside influence as it is a secularisation. Much of the 'Igbo' weddings you see are not the Igbo weddings of the past. The Igbo weddings of the past were mostly the protocols know today, but also a ritual of a woman ceremoniously being taken by her husband from her house or even being 'kidnapped' by her friends at night and taken to her husbands place. Many of the Igbo customs including attires like red caps were part of specific subgroups or areas but have been taken as a general Igbo culture in the 20th century, including wedding customs.

You got anymore?

fact

OP is right. Especially d coral beads and dressing. But these things are inevitable as communities come in closer contact with each other

LOL @ the president of Ugwuruta.